Honestly, my best advice is to get used to it. The new interface was a little foreign to me at first as well, but I've definitely gotten used to it (though I do have to turn off the avatars that appear next to messages). Sure, you can uninstall updates and try to keep the old version as long as you can, but (1) you're also possibly missing out on security updates that are important and, (2) eventually you're gonna get a new phone and have no choice but to use the updated version...so why not just adapt to the new version now?